Index: trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 5772)
+++ trunk/test/unit/org/openstreetmap/josm/tools/UtilsTest.java	(revision 5772)
@@ -0,0 +1,53 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.tools;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Unit tests of {@link Utils} class.
+ */
+public class UtilsTest {
+
+    /**
+     * Test of {@link Utils#strip} method.
+     */
+    @Test
+    public void testStrip() {
+        final String someWhite = 
+            "\u00A0"+ // SPACE_SEPARATOR
+            "\u2007"+ // LINE_SEPARATOR
+            "\u202F"+ // PARAGRAPH_SEPARATOR
+            "\u0009"+ // HORIZONTAL TABULATION
+            "\n"    + // LINE FEED (U+000A, cannot be put as it in Java)
+            "\u000B"+ // VERTICAL TABULATION
+            "\u000C"+ // FORM FEED
+            "\r"    + // CARRIAGE RETURN (U+000D, cannot be put as it in Java)
+            "\u001C"+ // FILE SEPARATOR
+            "\u001D"+ // GROUP SEPARATOR
+            "\u001E"+ // RECORD SEPARATOR
+            "\u001F"+ // UNIT SEPARATOR
+            "\u2003"+ // EM SPACE
+            "\u2007"+ // FIGURE SPACE
+            "\u200B"+ // ZERO WIDTH SPACE
+            "\u3000"; // IDEOGRAPHIC SPACE
+        Assert.assertNull(Utils.strip(null));
+        Assert.assertEquals("", Utils.strip(""));
+        Assert.assertEquals("", Utils.strip(" "));
+        Assert.assertEquals("", Utils.strip("  "));
+        Assert.assertEquals("", Utils.strip("   "));
+        Assert.assertEquals("", Utils.strip(someWhite));
+        Assert.assertEquals("a", Utils.strip("a"));
+        Assert.assertEquals("ab", Utils.strip("ab"));
+        Assert.assertEquals("abc", Utils.strip("abc"));
+        Assert.assertEquals("a", Utils.strip(" a"));
+        Assert.assertEquals("ab", Utils.strip(" ab"));
+        Assert.assertEquals("abc", Utils.strip(" abc"));
+        Assert.assertEquals("a", Utils.strip("a "));
+        Assert.assertEquals("ab", Utils.strip("ab "));
+        Assert.assertEquals("abc", Utils.strip("abc "));
+        Assert.assertEquals("a", Utils.strip(someWhite+"a"+someWhite));
+        Assert.assertEquals("ab", Utils.strip(someWhite+"ab"+someWhite));
+        Assert.assertEquals("abc", Utils.strip(someWhite+"abc"+someWhite));
+    }
+}